Currently there are 169 municipalities with google EIE transport data which are predominantly inner-city municipalities with a population of >25,000. For these municipalities emissions for On-road transport are calculated utilising activity data provided by Google Environmental Insights Explorer (EIE).
This data details passenger vehicle travel in kilometres by different modes (automobile, train, tram, bus, and motorcycle) aggregated to the municipal boundary. This data is then converted into emissions using factors sourced from the National Greenhouse Accounts Factors published by the Australian Department of Environment and Energy. The activity data represents kilometres travelled for trips that are wholly within the municipal boundary (Scope 1) and trips that begin or end within the municipality boundary but not both (Scope 3). This method set is identified as ‘City-induced activity’ by the GPC.
Because Google EIE data is locally sourced it is considered high quality Tier 2 data i.e. it represents actual travel within the municipality rather than being modelled from state level data.
For more information on On Road (Google EIE) transport calculations please see the Methodology document which can be downloaded from the Resources page.